The hotel is 'famous as' the place where the treaty was signed.
a 'famous' entertainer/explorer/athlete/politician
The hotel is (justly) 'famous for' its luxury.
(..) from these stars? The stars don't tell the future, Donkey. They tell stories. Look, there's Bloodnut, the Flatulent. - You can guess what he's famous for. - I know you're making this up. No, look. There he is, and there's the group of hunters running away from his stench. (..)2001 Shrek